# -----------------------------------------------------------------------------
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#
# This software is dual-licensed to you under the Universal Permissive License
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# the following applies:
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# Licensed under the Apache License, Version 2.0 (the "License");
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#    https://www.apache.org/licenses/LICENSE-2.0
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# -----------------------------------------------------------------------------

# -----------------------------------------------------------------------------
# last_rowid_async.py
#
# An asynchronous version of last_rowid.py
#
# Demonstrates the use of the cursor.lastrowid attribute.
# -----------------------------------------------------------------------------

import asyncio

import oracledb
import sample_env


async def main():
    connection = await oracledb.connect_async(
        user=sample_env.get_main_user(),
        password=sample_env.get_main_password(),
        dsn=sample_env.get_connect_string(),
        params=sample_env.get_connect_params(),
    )

    with connection.cursor() as cursor:
        # insert a couple of rows and retain the rowid of each
        row1 = [1, "First"]
        row2 = [2, "Second"]

        await cursor.execute(
            "insert into mytab (id, data) values (:1, :2)", row1
        )
        rowid1 = cursor.lastrowid
        print("Row 1:", row1)
        print("Rowid 1:", rowid1)
        print()

        await cursor.execute(
            "insert into mytab (id, data) values (:1, :2)", row2
        )
        rowid2 = cursor.lastrowid
        print("Row 2:", row2)
        print("Rowid 2:", rowid2)
        print()

        # the row can be fetched with the rowid that was returned
        await cursor.execute(
            "select id, data from mytab where rowid = :1", [rowid1]
        )
        print("Row 1:", await cursor.fetchone())
        await cursor.execute(
            "select id, data from mytab where rowid = :1", [rowid2]
        )
        print("Row 2:", await cursor.fetchone())
        print()

        # updating multiple rows only returns the rowid of the last updated row
        await cursor.execute("update mytab set data = data || ' (Modified)'")
        await cursor.execute(
            "select id, data from mytab where rowid = :1", [cursor.lastrowid]
        )
        print("Last updated row:", await cursor.fetchone())

        # deleting multiple rows only returns the rowid of the last deleted row
        await cursor.execute("delete from mytab")
        print("Rowid of last deleted row:", cursor.lastrowid)

        # deleting no rows results in a value of None
        await cursor.execute("delete from mytab")
        print("Rowid when no rows are deleted:", cursor.lastrowid)

        # Don't commit - this lets us run the demo multiple times
        # await connection.commit()


asyncio.run(main())
